Multi-leg consolidation with some collect orders

Hello,

I'm about to start modeling a multi-leg planning scenario, and I'd appreciate some input on best approaches.

The scenario is that I have 2 legs where we consolidate orders. The legs go through a transload point. However, some orders are collect on the second leg only. For example:

Order123 - we pay for both legs
Order456 - we pay just for leg #1; customer picks up at the transload warehouse.

So....

I'm ok with the 2nd leg shipment being built for order456 as long as I can show it as collect, etc. to keep it from getting paid accidentally.

Thanks in advance for your planning model inputs....